What are tangible bitcoins?

Excuse me, but I'm a bit confused about something. Could you possibly clarify what exactly are tangible bitcoins? I've heard of digital bitcoins, but the term "tangible" suggests something physical, which seems to contradict the virtual nature of cryptocurrency. Are there any physical representations or tokens that can be considered as tangible bitcoins, or is this simply a misnomer? I'd appreciate any insight you could provide on this matter.